Add Tinyauth as a valid auth check in swag-proxies.py

[sojudev]

---

• I have read the contributing guideline and understand that I have made the correct modifications

---

Description:

• Added support to check whether Tinyauth is used for application proxies in swag-proxies.py

Benefits of this PR and context:

• It's a pretty simple PR and will help support the users who want to use Tinyauth (that also use swag + swag-dashboard).
• I could have made this into an issue, but I wanted to have my first FOSS contribution and it seemed like an easy problem to handle.

How Has This Been Tested?

• Found the problem by first configuring Tinyauth for firefox.subdomain.conf and checking my swag dashboard and seeing No Auth
• Resolved by finding the appropriate file that checks the <auth>-location.conf files
• Updated the file to include Tinyauth
• Confirmed that my swag dashboard now shows firefox as authenticated and when hovering Tinyauth

Source / References:

• N/A

[LinuxServer-CI]

PR build pushed to ghcr.io/linuxserver/mods:pull_request_1047

[quietsy]

LGTM